Open AccessDirectional single mode emission in a microcavity laser
Author(s) -
Myung-Woon Kim,
Yi Cui,
Seog-Hoon Rim,
Chil-Min Kim,
Jong-Hoi Kim,
Kwang-Ryung Oh
Publication year - 2012
Publication title -
optics express
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 1.394
H-Index - 271
ISSN - 1094-4087
DOI - 10.1364/oe.20.013651
Subject(s) - lasing threshold , optics , laser , semiconductor laser theory , gain switching , isosceles triangle , single mode optical fiber , materials science , equidistant , optoelectronics , resonance (particle physics) , amplified spontaneous emission , physics , atomic physics , geometry , mathematics
We report directional single mode emission in an InGaAsP semiconductor microcavity laser, which is composed of a circle and an isosceles trapezoid. When exciting a whole cavity, the laser generates a single mode without hopping in two directions over a wide range of continuous injection currents. In the emission spectrum, it is confirmed from the equidistant mode spacing that a scar mode becomes a single lasing mode above the lasing threshold. A numerical analysis of the boundary element method shows that the far-field pattern of the resonance agrees well with that of the experiment.